keyword
MENU ▼
Read by QxMD icon Read
search

Gold

keyword
https://www.readbyqxmd.com/read/28239778/-minimally-invasive-bypass-surgery-for-nasolacrimal-duct-obstruction-transcanalicular-laser-assisted-dacryocystorhinostomy
#1
K R Koch, C Cursiefen, L M Heindl
BACKGROUND: In recent years, the minimally invasive surgical procedure of transcanalicular laser-assisted dacryocystorhinostomy (TKL-DCR) has gained importance in the treatment of primary acquired nasolacrimal duct obstructions (PANDO). OBJECTIVES: Surgical indications, functional success rates, potential advantages, and complications of TKL-DCR are presented and compared with the standard procedures external (EXT-DCR) and endonasal DCR (EN-DCR). METHODS: The study comprises a PubMed literature review and our own clinical results...
February 26, 2017: Der Ophthalmologe: Zeitschrift der Deutschen Ophthalmologischen Gesellschaft
https://www.readbyqxmd.com/read/28239721/broad-scope-gold-i-catalysed-polyenyne-cyclisations-for-the-formation-of-up-to-four-carbon-carbon-bonds
#2
Zhouting Rong, Antonio M Echavarren
The polycyclisation of polyenynes catalyzed by gold(i) has been extended for the first time to the simultaneous formation of up to four carbon-carbon bonds, leading to steroid-like molecules with high stereoselectivity in a single step with low catalyst loadings. In addition to terminal alkynes, bromoalkynes can also be used as initiators of polyene cyclisations, giving rise to synthetically useful cyclic bromoalkenes.
February 27, 2017: Organic & Biomolecular Chemistry
https://www.readbyqxmd.com/read/28239709/controlled-hierarchical-assembly-of-gold-nanoparticles-in-macroscopic-films-from-densely-packed-monolayers-to-networks-of-micropores-and-nanobundles
#3
Steven Gravelsins, Minhal Hasham, Yi Lin, Kevin Yu, Monique Tie, Cynthia Goh, Al-Amin Dhirani
The present study demonstrates the ability of excess, weakly amphiphilic n-alkanethiols (n = 4, 12, 18) and solvent composition to tune through a wide range of large-scale, macroscopic architectures formed by alkanethiol-capped Au nanoparticles (NPs). Both the alkanethiols and NPs are significantly hydrophobic species and compete for surface area at an air-water interface. When solutions of the two species are spread on a large (50 cm(2)) water surface in a Teflon well, a thin film forms and exhibits co-existing macroscopic regions with various distinct NP self-assembled architectures, namely a close packed monolayer, a network phase characterized by micron-sized pores (micropores) surrounded by quasi-linear bundles of nanoparticles, and finally aggregates...
February 27, 2017: Soft Matter
https://www.readbyqxmd.com/read/28239701/divergent-synthesis-from-reactions-of-2-trifluoromethyl-1-3-conjugated-enynes-with-n-acetylated-2-aminomalonates
#4
Jieru Yang, Xiaofan Zhou, Yu Zeng, Chaoqian Huang, Yuanjing Xiao, Junliang Zhang
A simple base mediated reaction of 2-trifluoromethyl-1,3-conjugated enynes with N-acetylated 2-aminomalonates was developed, which could deliver two distinct types of products depending on substrates, i.e. 4-trifluoromethyl pyrrolidine derivatives, or gem-difluoro-1,3-conjugated enyne derivatives. Various functionalized 4-(difluoromethylene)-1,2,3,4-tetrahydropyridines could be obtained in good yields via the gold(i)-catalysed 6-endo-dig cyclization of the corresponding gem-difluoro-1,3-conjugated enynes under mild conditions...
February 27, 2017: Organic & Biomolecular Chemistry
https://www.readbyqxmd.com/read/28239426/validation-of-non-smoking-status-by-spouse-following-a-cessation-intervention
#5
Raul M Mejia, Sandra Braun, Lorena Peña, Steven E Gregorich, Eliseo J Pérez-Stable
BACKGROUND: Following cessation interventions, self-reported smoking abstinence with biochemical verification is the "gold standard" for defining outcomes. Because obtaining biochemical verification is challenging in community studies, we compared self-reported cessation among smokers completing treatment to the smoking status reported by each participant's spouse or proxy. METHOD: Participants were smokers who had reported quitting 12 months after a cessation intervention...
March 2017: Journal of Smoking Cessation
https://www.readbyqxmd.com/read/28239371/loop-mediated-isothermal-amplification-label-based-gold-nanoparticles-lateral-flow-biosensor-for-detection-of-enterococcus-faecalis-and-staphylococcus-aureus
#6
Yi Wang, Hui Li, Yan Wang, Lu Zhang, Jianguo Xu, Changyun Ye
The report describes a simple, rapid and sensitive assay for visual and multiplex detection of Enterococcus faecalis and Staphylococcus aureus based on multiple loop-mediated isothermal amplification (mLAMP) and lateral flow biosensor (LFB). Detection and differentiation of the Ef0027 gene (E. faecalis-specific gene) and nuc gene (S. aureus-specific gene) were determined using fluorescein (FITC)-and digoxin-modified primers in the mLAMP process. In the presence of biotin- and FITC-/digoxin-modified primers, the mLAMP yielded numerous biotin- and FITC-/digoxin-attached duplex products, which were detected by LFB through biotin/streptavidin interaction (biotin on the duplex and streptavidin on the gold nanoparticle) and immunoreactions (FITC/digoxin on the duplex and anti-FITC/digoxin on the LFB test line)...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28239067/recent-evolution-of-endoscopic-endonasal-surgery-for-treatment-of-pituitary-adenomas
#7
Hiroshi Nishioka
For the treatment of pituitary tumors, microscopic transsphenoidal surgery has been considered the "gold standard" since the late 1960s. Over the last two decades, however, a worldwide shift towards endoscopic endonasal surgery is in progress for many reasons. These include a wide panoramic view, improved illumination, an ability to look around anatomical corners using angled tip and, in addition, application to the extended approaches for parasellar tumors. Both endoscopic and microscopic approaches appear equally effective for nonfunctioning adenomas without significant suprasellar or lateral extensions, whereas the endoscopic approach may improve outcomes associated with the extent of resection and postoperative complications for larger tumors...
February 24, 2017: Neurologia Medico-chirurgica
https://www.readbyqxmd.com/read/28238752/gold-nanoparticle-interactions-in-human-blood-a-model-evaluation
#8
Niloofar Ajdari, Cian Vyas, Stephanie L Bogan, Bashir A Lwaleed, Brian G Cousins
In this study, we investigated gold nanoparticle (AuNP) interactions in blood using thromboelastography as a rapid screening tool to monitor their influence on blood coagulation. 1.2nM colloidal AuNPs ranging from 12 to 85nm have no effect in the blood, however, 5nM AuNPs demonstrate pro-thrombogenic concentration dependent effects with a reduction in clot formation. Size effects exhibit a non-linear trend with 45 and 85nm particles resulting in a faster pro-thrombotic response. Clot strength decreased with AuNP size with the greatest reduction with 28nm particles...
February 23, 2017: Nanomedicine: Nanotechnology, Biology, and Medicine
https://www.readbyqxmd.com/read/28238738/reference-standard-space-hippocampus-labels-according-to-the-eadc-adni-harmonized-protocol-utility-in-automated-volumetry
#9
Dominik Wolf, Martina Bocchetta, Gregory M Preboske, Marina Boccardi, Michel J Grothe
BACKGROUND: A harmonized protocol (HarP) for manual hippocampal segmentation on magnetic resonance imaging (MRI) has recently been developed by an international European Alzheimer's Disease Consortium-Alzheimer's Disease Neuroimaging Initiative project. We aimed at providing consensual certified HarP hippocampal labels in Montreal Neurological Institute (MNI) standard space to serve as reference in automated image analyses. METHODS: Manual HarP tracings on the high-resolution MNI152 standard space template of four expert certified HarP tracers were combined to obtain consensual bilateral hippocampus labels...
February 23, 2017: Alzheimer's & Dementia: the Journal of the Alzheimer's Association
https://www.readbyqxmd.com/read/28238678/penile-lengthening-girth-and-size-preservation-at-the-time-of-penile-prosthesis-insertion
#10
REVIEW
Henry Tran, Robert Goldfarb, Anika Ackerman, Robert J Valenzuela
INTRODUCTION: Penile prosthetic devices are the gold standard treatment of medication-refractory erectile dysfunction. Inflatable penile prosthetic (IPP) devices have been available and used for more than four decades. Oftentimes, medical conditions causing erectile dysfunction also cause penile shortening, causing decreased patient quality of life. AIM: To identify and review all available penile lengthening procedures that can be performed at time of IPP insertion...
February 23, 2017: Sexual Medicine Reviews
https://www.readbyqxmd.com/read/28238634/the-cumulative-effects-of-intravenous-antibiotic-treatments-on-hearing-in-patients-with-cystic-fibrosis
#11
Angela C Garinis, Campbell P Cross, Priya Srikanth, Kelly Carroll, M Patrick Feeney, Douglas H Keefe, Lisa L Hunter, Daniel B Putterman, David M Cohen, Jeffrey A Gold, Peter S Steyger
BACKGROUND: Aminoglycosides (AGs) and glycopeptides are antibiotics essential for treating life-threatening respiratory infections in patients with cystic fibrosis (CF). The goal of this study was to examine the effects of cumulative intravenous (IV)-AG (amikacin and/or tobramycin) and/or glycopeptide (vancomycin) dosing on hearing status in patients with CF. METHODS: Hearing thresholds were measured from 0.25 to 16.0kHz, in 81 participants with CF. Participants were categorized into two groups: normal hearing in both ears (≤25dB HL for all frequency bands) or hearing loss (>25dB HL for any frequency band in either ear)...
February 23, 2017: Journal of Cystic Fibrosis: Official Journal of the European Cystic Fibrosis Society
https://www.readbyqxmd.com/read/28238416/quantitative-multiplexed-tandem-pcr-for-direct-detection-of-bacteraemia-in-critically-ill-patients
#12
Andrew N Ginn, Briony Hazelton, Shereen Shoma, Martin Cullen, Thomas Solano, Jonathan R Iredell
Culture remains the gold standard for diagnosis of blood stream infections (BSI), but its clinical utility is limited by slow turnaround times. Here we describe a method for rapid quantitative detection of bacterial DNA directly extracted from whole blood using a multiplexed tandem real-time PCR (MT-PCR) assay targeting Staphylococcus, Streptococcus, Pseudomonas, Enterococcus and Enterobacteriaceae 16S rDNA genes. Results were available less than 3.5 hours after blood collection with all five bacterial targets having limits of detection between 10(1) and 10(3) CFU/mL...
February 23, 2017: Pathology
https://www.readbyqxmd.com/read/28238388/multicenter-evaluation-of-the-revised-rida%C3%A2-quick-test-n1402-for-rapid-detection-of-norovirus-in-a-diagnostic-laboratory-setting
#13
Stijn Jonckheere, Nadine Botteldoorn, Patricia Vandecandelaere, Johan Frans, Wim Laffut, Guy Coppens, Anne Vankeerberghen, Hans De Beenhouwer
The updated RIDA® QUICK (N1402) immunochromatographic assay (R-Biopharm) for detection of norovirus was evaluated during a prospective, multicenter study using 771 stool samples from patients with gastroenteritis. Compared to real-time reverse transcriptase polymerase chain reaction (RT-rtPCR) as gold standard, the RIDA® QUICK had an overall sensitivity of 72.8% (91/125) and a specificity of 99.5% (640/643). Genotype analysis of the polymerase (ORF1) and capsid (ORF2) region of the genome indicated that the RIDA® QUICK assay could detect a broad range of genotypes including new variants (15 of 125 positive samples) which were detected by an in-house SYBR®Green RT-rtPCR, but not by the RIDA® GENE PCR PG1415 (R-Biopharm) and mostly not by the RIDA® GENE PCR PG1405 and the Xpert® Norovirus assay (Cepheid)...
February 12, 2017: Diagnostic Microbiology and Infectious Disease
https://www.readbyqxmd.com/read/28238335/translation-and-validation-of-the-diabetes-eating-problem-survey-to-screen-eating-disorders-in-patients-with-type-1-diabetes-mellitus
#14
Cintia Sancanuto, Diana Jiménez-Rodríguez, Francisco Javier Tébar, Juan José Hernández-Morante
INTRODUCTION: The treatment of type-1 diabetes mellitus (T1DM) requires changes in patients' eating habits and lifestyles which could lead to the development of an eating disorder (ED). An early detection of these disorders in subjects with T1DM is necessary. However, there is no specific questionnaire concerning the presence of an ED in these patients. OBJECTIVES: To translate and validate for the Spanish population a specific questionnaire aimed at detecting the risk of onset of an ED on a sample of subjects with T1DM...
February 18, 2017: Medicina Clínica
https://www.readbyqxmd.com/read/28238229/suspecting-non-cystic-fibrosis-bronchiectasis-what-the-busy-primary-care-clinician-needs-to-know
#15
REVIEW
Diego J Maselli, Bravein Amalakuhan, Holly Keyt, Alejandro A Diaz
AIMS: Non-cystic fibrosis bronchiectasis (NCFB) is a chronic, progressive respiratory disorder characterised by irreversibly and abnormally dilated airways, persistent cough, excessive sputum production and recurrent pulmonary infections. In the last several decades, its prevalence has increased, making it likely to be encountered in the primary care setting. The aim was to review the clinical presentation and diagnosis of NCFB, with an emphasis on the role of computed tomography (CT)...
February 2017: International Journal of Clinical Practice
https://www.readbyqxmd.com/read/28238138/dual-wavelength-triggered-gold-nanorods-for-anticancer-treatment
#16
Dennis B Pacardo, Frances S Ligler, Zhen Gu
Gold nanomaterials with light-responsive properties can be exploited as light-triggered delivery vehicles to enhance the therapeutic efficacy of anticancer drugs. Additionally, different wavelengths of light can be utilized to achieve the combined effects of light-triggered release of therapeutics and light-induced localized heating, which results in improved anticancer efficacy. Herein, we describe methods to develop gold nanorod (AuNR) complexes that provide drug delivery or photothermal therapy when activated by ultraviolet (UV) or near-infrared (NIR) wavelengths of light, respectively...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28238137/spectroscopic-photoacoustic-imaging-of-gold-nanorods
#17
Austin Van Namen, Geoffrey P Luke
Photoacoustic imaging is a rapidly developing tool capable of achieving high-resolution images with optical contrast at imaging depths up to a few centimeters. When combined with targeted nanoparticle contrast agents, sensitive detection of molecular signatures is possible. In this chapter, we discuss the achievements and future directions of nanoparticle-augmented photoacoustic imaging. We present a method to synthesize silica-coated gold nanorods, which are highly stable, signal amplifying photoacoustic contrast agents, and also describe spectroscopic image acquisition and processing steps to provide a specific map of nanoparticle distribution in vivo...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28238135/a-gold-polydopamine-core-shell-nanoprobe-for-long-term-intracellular-detection-of-micrornas-in-differentiating-stem-cells
#18
Chun Kit K Choi, Chung Hang J Choi, Liming Bian
MicroRNAs (miRNAs) represent an emerging class of biomarkers for studying and understanding biological events; the development of viable tools for detecting or monitoring the intracellular expression levels of specific miRNAs is of great interest to life scientists and biomedical engineers. Here, we describe the fabrication of a novel class of core-shell nanoprobes that comprise a gold nanoparticle core and a polydopamine (PDA) shell. Our nanoprobes can be used to specifically track the expression profiles of two miRNA markers of osteogenic differentiation (i...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28238127/ligand-exchange-and-1-h-nmr-quantification-of-single-and-mixed-moiety-thiolated-ligand-shells-on-gold-nanoparticles
#19
Ashley M Smith, Jill E Millstone
The use of nanoparticles in biomedicine critically depends on their surface chemistry. For metal nanoparticles, a common way to tune this surface chemistry is through mass action ligand exchange, where ligand exchange can be used to expand the functionality of the resulting nanoparticle conjugates. Specifically, the quantity, identity, and arrangement of the molecules in the resulting ligand shell each can be tuned significantly. Here, we describe methods to exchange and quantify thiolated and non-thiolated ligands on gold nanoparticle surfaces...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28238126/quantification-of-sirna-duplexes-bound-to-gold-nanoparticle-surfaces
#20
Jilian R Melamed, Rachel S Riley, Danielle M Valcourt, Margaret M Billingsley, Nicole L Kreuzberger, Emily S Day
RNA interference (RNAi)-based gene regulation has recently emerged as a promising strategy to silence genes that drive disease progression. RNAi is typically mediated by small interfering ribonucleic acids (siRNAs), which, upon delivery into the cell cytoplasm, trigger degradation of complementary messenger RNA molecules to halt production of their encoded proteins. While RNAi has enormous clinical potential, its in vivo utility has been hindered because siRNAs are rapidly degraded by nucleases, cannot passively enter cells, and are quickly cleared from the bloodstream...
2017: Methods in Molecular Biology
keyword
keyword
4213
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"